RFR: Command line flags cleanup

[Per Liden]

Thanks for reviewing!

/Per

On 2018-03-16 10:01, Stefan Karlsson wrote:
> Looks good.
>
> StefanK
>
> On 2018-03-16 09:57, Per Liden wrote:
>> Two patches to clean up our command line flags. One to remove 
>> UseLoadBarrier. It's a dangerous flag to use but was useful in early 
>> development phases, but not so much any more. If UseZGC is true, then 
>> UseLoadBarrier should also always be true. The second patch converts 
>> our debugging-related options to diagnostic flags (instead of being 
>> product flags).
>>
>> * ZGC: Remove UseLoadBarrier command line flag
>> http://cr.openjdk.java.net/~pliden/zgc/remove_use_load_barrier_flag/webrev.0 
>>
>>
>> * ZGC: Make some command line flags diagnostic instead of product
>> http://cr.openjdk.java.net/~pliden/zgc/make_some_flags_diagnostic/webrev.0 
>>
>>
>> /Per